Apparatus for disintegrating shavings.



' "Lllfififia D. E- MARSHALL.

APPARATUS FOR DISINTEGRATQNGSHAVINGS. APPLicATmN FILED NOV. 1, 1915.

Patentfl Jan. 9, 1917.

2 SHEETS-SHEET I.

[l Qi. 30

Dau/o E. Mars/2 a//,

n. E. MARSHALL.

APPARATUS FOR DISINTEGRATING SHAVINGS.

APPLICATION FILED NOV. I. 1915.

Patented Jan. 9,1917.

2 SHEETSSHEET Z- 3.21 LINE DAVID E. MARSHALL, OF KANSAS CITY, MISSOURI.

APPARATUS FOR DISINTEGRATING SHAVIN GS.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed November 1, 1915. Serial No. 59,124.

To all whom it may concern:

Be it known that I, DAVID E. MARSHALL, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Apparatus for Disintegra'ting Shavings, of which the following is a specification.

This invention relates to an apparatus for reducing wood waste to a fine granular form resembling sawdust.

In woodworking plants, furniture factories, planing mills, etc., vast quantities of of the invention, certain parts being shownin section. Fig. 2 is an enlarged view in central vertical section of the preferred form of reducing hopper and vortex forming means, the latter being partly in elevation. Fig. 3 is a sectional plan view, taken on line IIIIII of Fig. 2. Fig. 4 is a sectional plan view of the vortex former, taken on line IVIV of Fig. 2.

Referring to Fig. 1, the letter A designates a rotary blower or fan, of which 1 is the intake and 2, the discharge. 3 is a receiving trunk which is connected to the fan intake 1 and is provided with branches 4 into which the wood waste is deposited either by sweeping or otherwise. 5 is a branch tube and 6, a hopper at the upper end thereof, the function thereof being hereinafter described. Supported directly above the hopper 6 is a downwardly tapered cylindrical shell 7, in the bottom 8 of which is a small concentric tube 9, having open top and bottom. Secured within the tapered portion 7, is a reducing hopper B, which as shown comprises six plane walls 10 made of woven wire or other perforate metallic structure. Adjacent walls 10 are united or joined along their meeting edges by means of small bolts 11 which pass through holes in flanges 12': of Y sectioned angle-bars 12. Said bars are supported by suitable knees or brackets 13 which are riveted to the shell 7 as shown at 14, Fig. 2. WValls 10 are hereinafter termed screens.

The lower part of shell 7 has an annular bottom 15 (Fig. 3)' in which are two circular openings 29 in which are fitted the discharge spouts 16, 17. One spout, 17, is offset sidewise, as'shown at 18, to permit material to fall fromv tube 9 into hopper 6, and said spout is connected below the offset to the other spout 16, at 19.

Supported above the reducing hopper B, is a vortex former C. In the construction shown, this comprises an outer drum 20, a hood 21 spaced above said drum 20 to leave an air opening 21, a tubular core 22, an annular head 23, and a blast tube 24 which discharges a stream into the annular vortex chamber 25 in a tangential or non radial direction, through an opening 26. Tube 24 is izonnected by a tube 30, with the blower outet 2. Details: The drum 2O rests upon, or

touches, the tops of the perforate walls 10,

and has a flange 27 that meets the top of the tapered drum 7. The hood 21 is mounted on lugs 28. The core 22 is supported by the annular head 23, as by soldering. The parts shown by Fig. 2 may be supported in any suitable manner, either from joists or from the floor.

The apparatus having now been fully described, the manner in which the same is to 'be employed is as follows. The blower A being put in motion and driven at high velocity by a motor (not shown) said blower will induce a current of air through each branch 4 and trunk 3, through the blower,

thence through tubes 30 and 24, into the vortex chamber 25, where it takes a rotary and descending, spiral motion. Passing into the hopper B and through its screens 10 the air maintains the descending, spiral motion, and escapes through spouts 16, 17 Air will also be drawn into the core tube 22 beneath the hood 21. And air will also be sucked into receiving hopper 6 and tube 5. When the raw material (consisting of, say, shavings, chips, blocks and sawdust) is fed into a branch 4, it is swept along through tube 3, blower A, tubes 30, 24, into chamber 25, where it forms a descending vortex having high Velocity. By gravity and air pressure the pieces of Wood are carried slowly downward, and by centrifugal force they are dashed violently upon the angularly disposed screens 10, w ose flatness augments the force of the im cts. By thls means the shavings and t e solid pieces are cut, broken and abraded, thereby forming sawdust which passes into the receiver 7 and spouts 16, 17 being discharged by spout 16 at 31.

The material will not all be reduced to sawdust by one passage through the apparatus, and obviously the portion which does not pass through the screenperforations will descend through tube 9 and be blown into hopper 6, whence it will be conve ed by the air stream through tube 5 into t e blower, thence back to the vortex former and reducing hopper where it will be again subjected to the aforesaid cutting, a rading, and

breaking action upon'the screens 10. This operation is repeated endlessly, and thus the coarse material will be continuously reduced to a granular form as received through the discharge spout 16.

The wire of which the screens 10 are woven may be of square or other noncircular section, but round wire has been found operative.

Having thus described my invention, what I claim and desire to secure by Letters Pat ent, is:

1. In combination, a receptacle comprising a plurality of angularly disposed inclined perforated walls, and pneumatic means for driving a vortical stream of Wood waste into said receptacle and against said walls.

2. In combination, a receptacle comprising a plurality of angularly disposed inclined perforated walls, and pneumatic means for maintaining a descendin vortex of air laden with wood waste, wit said receptacle.

3. In combination, a receiving trunk, a delivery trunk, a rotary blower connected between said trunks, a drum having a vertical axis, said delivery trunk being connected non-radially to said drum, a pneumatic wood reducing hopper below and communicating with said drum, said hopper having an open bottom for eduction of unreduced material,

a receptacle spaced below said open bottom to receive the unreduced material, and a spout from said receptacle to said receiving trunk. I

' 4. In combination, a receiving trunk, a deliver trunk, means for circulating air throug said trunks at high velocity, a drum having a vertical axis and with which the delivery trunk is connected on a tangent, a pneumatic wood reducing hopper below and communicating with said trunk and em bodying angularly disposed screens, said hopper having an open bottom for eduction of unreduced material, a receptacle spaced below said open bottom to receive the unreduced material, a spout leading from said receptacle to the receiving trunk, a conical shell surrounding the wood reducing hopper to receive the reduced material therefrom,

' and two communicating spouts leading from the bottom of said. shell to conduct the reduced material therefrom.-

In testimony whereof I afiix my signature, in the presence of two witnesses.

DAVID E. MARSHALL.

Witnesses:

F. G. Fxsoimn,

L. J. -FISGHER. 

